Musculocutaneous nerve

This video tutorial explores the anatomy and innervation of the musculocutaneous nerve, a key peripheral nerve in the upper arm. It details the muscles it supplies, such as the biceps brachii, brachialis, and coracobrachialis, and its role in innervating the skin on the lateral forearm through the lateral cutaneous nerve. The nerve's origin in the brachial plexus and its anatomical course are discussed, including its interaction with the median nerve. The video concludes with a call to explore more resources on Kenhub.

Which muscles are innervated by the musculocutaneous nerve?

• Supraspinatus, infraspinatus, and teres minor

• Biceps brachii, brachialis, and coracobrachialis

• Triceps brachii, deltoid, and teres major

• Pectoralis major, latissimus dorsi, and serratus anterior

Where does the musculocutaneous nerve originate?

• Anterior cord of the brachial plexus

• Lateral cord of the brachial plexus

• Posterior cord of the brachial plexus

• Medial cord of the brachial plexus

What is the path of the musculocutaneous nerve in relation to the brachialis and biceps brachii?

• Lateral to both brachialis and biceps brachii

• Anterior to brachialis and dorsal to biceps brachii

• Medial to both brachialis and biceps brachii

• Posterior to both brachialis and biceps brachii

What does the lateral cutaneous nerve supply?

• Skin on the anterior aspect of the forearm

• Skin on the medial aspect of the forearm

• Skin on the lateral aspect of the forearm

• Skin on the posterior aspect of the forearm

How does the musculocutaneous nerve interact with the median nerve?

• It often adheres to and interacts with the median nerve

• It runs parallel to the median nerve without interaction

• It never interacts with the median nerve

• It crosses over the median nerve without interaction